Pump for portable vacuum-cleaners.



I; K. BAXTER & 0.1. BARRETT. PUMP FOB PORTABLE VACUUM CLEANERS.

' APPLIGATIQH FILED MAY 24, 1810. I Patented July 1;, 1911.

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1 INVENTORS WITNESSES: f

I. K. BAXTER & G. F. BARRETT. PUMP FORPORTABLE VACUUM 01.3mm

APPLICATION TILED MAY 24, 1910.

Patented July 11,1911,

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- 1. K. BAXTER & c. P..BA RRETT.

PUMP FOB. PORTABLE VACUUM CLEANERS.

APPLIOATIOH FILED HAY 24, 1910.

L E I M 1 Emfl 8 1 B N m Ju d8 3 m m P V WITNESSES:

OFFICE.

IRVING K. BAXTER, OF UTICA, NEW YORK, AND CHARLES F. BARRETT, OF BRIDGE- PORT, CONNECTICUT, ASSIGNORS TO THE STANDARD VACUUM CLEANER C0,, OF BRIDGEPORT, CONNECTICUT, A CORPORATION OF CONNECTICUT.

PUMP .FOR PORTABLE VACUUM-CLEANERS.

Patented July 11, 1911.

Application filed May 24, 1910. Serial No. 563,123.

To all whom 'it may concern:

Be it known that we, IRVING K. BAXTER, a citizen of the United States, residing at Utica, Oneida county, New York, and CHARLES, F. BARRETT, also a citizen of the United States, residing at Bridgeport, Fairfield county, Connecticut, have invented cer-.

tain new and useful Improvements in Pumps for Portable Vacuum-Cleaners; and

we do declare the following to be a full,

clear, and exact description of the invention,

such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to certain improvements in portable vacuum cleaners, but more particularly has reference to the pump whose function is to exhaust the air through the dust collector, and to the manner of supporting and operating said pump, and has for its object simplicity of construction, and efiiciency in operation, and with these ends in view our invention consists in the combination and arrangement of parts hereinafter fully set forth and then particularly pointed out in the claims which conclude this description.

In the accompanying drawing Figure l is aside elevation of our improvementl. ig. 2 a sectional elevation--Fig. 3 a detail section at the line w, w, of Fig. 1Fig. 4 a detail plan of the foot rest such as we prefer to employ when the apparatus is to be held 'do-uble acting, While thepump piston preferably operated by hand levers, the

pump and levers being preferablysupported by any suitable carriage or equivalent means, all ofwhich will be readily understood from the following description :The pump is formed of two complemcntal cuplike'sections 1, 2, having flanges 3, 4, extending from their edges, and a diaphragm 5 forming the piston made of leather or other suitable material and cup shaped, the edge of this diaphragm being confined between the flanges 3, 4, these parts being firmly secured together by means of bolts or screws 6, this arrangement not only-serving to secure the diaphragm in position but also affording an air tight connection between the such structure we prefer to employ a half ring 10 which lies against the flange 3 and meets the cradle while at the rear against the flange 4 we employ a whole ring 11 through which the bolts or screws 6 are passed in the proper clamping of. these flanges and the diaphragm 5, the lower portion of the ring 11 being bolted directly to the back rib 8, as above set forth.

12 is a rod preferably of brass the rear end of which is secured within a hub 18 that is rigid with the outer face of the section 2, and surrounding this rod is a steel tube 14, hereinafter referred to as the piston rod. The outer or wall portion of the diaphragm 5 is clamped between metal disks 15 and the piston rod 14 is secured thereto in any suitable and ordinary manner, so that. when the piston rod is reciprocated it will carry the diaphragm with it. ()n the outside of the section 1 is fixed an additional, support 1( for the piston rod, which latter passes outwardly through any suitable stuffing box 17 secured to such support.

The head 18 of the piston rod is closed by means of any suitable bolt 12) between the end of which bolt and the outer extremity of the rod 12 is an air space 20. The rod 12 is preferably a tube and a vent 21 is provided at the inner end of said tube and leading into the air space between the diaphragm and the section 2.

22 is the operating lever which is pivoted at the lower end to cars 23 that extend from the cradle, and is provided with'an elongated slot 24 through which the support 16 extends, a suitable handle 25 being fixed piston rod are in a fixed horizontal plane, and since the operating lever describes an arc in its movements in a plane that inter sects'the plane within which said piston rod moves, it follows that some sort of means must be employed as a compensating device,

wh'ereby the lever may operate the piston rod by a force directly applied andwithout any cramping or binding whatsoever, and therefore we have contrived such means and will now describe the same. Swiveled around the head 18 of the piston rod is a the valves an sleeve 26 from which extend diametrically opposite studs 27 having reduced portions 28, and extending from the lever 22 on opposite sides of the slot 24 and near the base thereof are cars 29 having extending there from reduced stud-like portions 30, and to.

these portions 28 and 30 are pivoted links 31, these links being held in positionby means of any suitable cross pins 32. Thus it will be seen that we have oked the operating lever directly to the piston rod through the medium of pivotal connections which constantly compensate for the arc-like movements of the lever and always permit the piston rod to be operated by a direct force and without any cramping or binding whatsoever.

The sections 1, 2, are equipped with spring actuated valves 33, 34, the spring in each instance operating to close the valves while the latter always open outwardly into the external atmosphere. Secured to the outside of the sections 1, 2, in any suitable manner so as to form an air tight connection with such sections'are complemental nozzle blocks 35, 36, which, when the sections 1, 2,

are secured together, likewise meet so as to be air tight, this being effected by means of any suitable gasket (not shown) placed intermediate of such nozzle blocks, the latter I the valves being normally closed against the seats 39, 40, by light coil springs 45, 46,

' which surround the stems and are confined between the valves and the sections 1, 2:

In the drawing only one of the valves 33,

34. is shown in solid lines. but the other valve is precisely the same both as to construction and arrangement, these valves normally closing the exhaust'openings in the pump sections while the valves 41, 42, normally close the inlets to the pump, so that i the air, after purificatiomcan be drawn s from the dust separating chamber into said describe any construction of dust collector, 5

since our improvement may be utilized in connection with any ap roved form of dust separating" chamber, an itis merely necessary to state that the chamber which contains the air purifying means is preferably connected with the exhaust pipe 47 and .inlet pipe 48 in such manner as to be suspended therefrom. Extendin from the block 36 is a socket 53 within whlcli is located any suitable handle 54, the disposition of this socket i being such that this handle may extend at any suitable and convenient angle to a horizontal plane.

55, 56, are bearings which depend from the cradle 7 and throughwhich extends an axle 57 having at its extremities wheels 58, these wheels being near the rear ofthe pump and in connection with the nozzle 49 constituting themeans for supporting the pump and-the parts carried thereby.

Our improvement may be operated while it is pushed about a room, in which instance the operating lever 22 would be hinged to a lug 59 extending from the lower forward portion of the cradle, the position of such ever and its handle portion 25 when thus pivoted being indicated at Fig. 1 by dotted lines, and the handles 25,54, would then be extended at the same inclination so that they could be conveniently grasped by the with the nozzle 49 only in contact there-with,

and then both handles could be worked inwardly and outwardly after the manner of bellows handles so as to create the desired suction through the dust separating chamber. Or, the operating lever 22 with its handle 25 could be pivoted as shown in solid I lines at Fig. 1 so as to stand in a vertical plane, and the apparatus could be held stationary by means of any suitable foot rest such as is shown at Fig.4, having at one end forked arms 61 adapted to be inserted within'perforated ears 62 depending from the lower portion of the cradle, the other extremity of said rest being in the form of a' platform 63 upon which latter the operator would place his foot and thus hold the appaor other horizontal surfaces, our improvethrough the pipe 48; on the return movement would be operated'in the manner first described, but in cleaning walls, curtains, furniture or irregular surfaces, our improvement would be held stationary by means of the foot rest in the manner last- .described.

The operation of our improved pump as hereinbeloredescribed is as follows:.=\s the piston rod is drawn outwardly carrying with it the diaphragm, the air in the space inclosed by the section 1 and diaphragm will be expelled through the opening in the section 1 that is normally closed by the valve 33, the valve 41 meanwhile being closed, and at the same time this collapsing action of thediaphragm will tend to create a vacuum in the space inclosed by said diaphragm and the section 2 and thiswill cause the valve 42 to open while the valve 3-1 will remain closed whereby a suction will be created through the pipe 47 and consequently ment of the piston rod the valve 42 will be closedgand the air in the space inclosed by the diaphragm and the section 2 will be expelled through the valve 34, and at the same time the valve 33 will remain closed and that. our improved pump may be operated by means of any suitable motor which is connected up with the piston rod in any ordinary and well known manner, and therefore we. do not wish to be limited to any construction of pump that is to be operated entirely by hand.

Neither the cradle nor the wheels are neces: sary elements of our improvement since the nozzle 49 may act asthe Sole point of Support and the operator maygrasp the handles 25, at. and propel the apparatus, at the same time operating these handles after the manner of bellows handles, and at Fig. 5 we have illustrated aform of our improvement especially adapted to be used in this particular manner, the only difference between the construction heretofore described and that shown at Fig. 5 being that in the latter the cradle and wheels are omitted and instead of the lug 59 a bracket 64 is bolted directly to the ring 10 and the operating lever 2 pivoted to the extremity of said bracket. In both instances, however, the nozzle. 49 is supported within .asuitable clamp (35 that is bolted to the pump sections,

and one handle is operatively connected with the pump piston rod while the other handle, the pump casing and the nozzle are all rigid together, and are therefore incorporated into one operative system the other system being the operating lever and the piston rod.

In the construction shown at Figs. 1 and )2, the shifting of the hand operating lever from one pivotal point to another is a very simple matter requiring but little time, and our improvement is thereby easily converted from a movable to a stationary apparatus. The provision of a. hollow piston rod sliding over and closely fitting a brass rod or tube makes a very advantageous construction, in that the piston rod has an elongated support and cannot possibly jam or bind as it starts on its inward stroke, and the vents 21 or 21 provide against any undue expansion and compression of the air which would other wise impede the movements of the piston rod. By removing the bolt 19 when the piston rod is drawn out, oil may be injected into the piston rod so as to sufliciently lubricate the latter in its movements along the rod 12.

Having thus described our invention what we claim as new and desire to secure by Letters Patent is:

1. In a vacuum cleaner, in combination with a wheeled support, spaced pivotal points carried bythe support, suetioncreatiug means secured to the support, a handle rigid with the support and a second handle having operating connection at an intermediate point with the said means for'opcrating the latter, the inner end of said second handle being movable to be pivoted to either of said pivotal supports whereby the second handle may assume a vertical or inclined position with respect to said means.

2. In a vacuum cleaner, in combination with a base having wheels, a pump carried by the base, spaced pivotal points carried by the base, a handle rigid with respect to the support, and an operating lever for the pump operatively connected to the latter and being for interchangeable pivotal connection with said pivotal points of the base whereby the lever may be moved to inclined and vertical positions with respect to the surface being cleaned.

' 3. Ina vacuum cleaner, in combination with a base having wheels, a pump carried by the base, spaced pivotal points carried by the base, a handle rigid with respect to the base, and an operating lever for the pump pivotally connected to the latter and being for interchangeable pivotal connection with said pivotal supports of the base whereby the lever may be moved to inclined and vertical positions with respect to the surface being cleaned, and means to engage the base to hold the same stationary when said lever is in its vertical position.

4. The; herein described means for operating a "portable suction creating device, comprising a Wheeled support, spaced pivotal points carried by said support, suction creating means mounted. 'on said support and having a horizontally disposed operating rod, a. handle inclined to a horizontal and rigid with said support, and a lever 0p. eratively connected with said rod at a point intermediate of the ends of said lever, the

operated in a vertical position While such support is stationary.

In testimony whereof We afiix our signatures in presence of two witnesses.

IRVING K. BAXTER. CHARLES F. BARRETT.

Witnesses:

F. W. SMITH, Jr., M. T. LONGDEN 

